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Analog Devices Inc. AD7862BRZ-10
- Part No.:
- AD7862BRZ-10
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7862BRZ-10.pdf
- Description:
- IC ADC 12BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,414
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Product details
Overview
AD7862BRZ-10 from Analog Devices is a dual 12-bit simultaneous-sampling analog-to-digital converter (ADC) with four analog inputs grouped into two synchronized channels (A and B), ±10 V input range, 3.6 µs conversion time, and high-speed parallel interface. It preserves phase coherence between channel pairs for AC motor control and power quality monitoring.
For engineers reviewing the AD7862BRZ-10 datasheet, AD7862BRZ-10 pinout, AD7862BRZ-10 application, or AD7862BRZ-10 equivalent, this page delivers verified specifications, real-world use cases, validated alternatives, package mapping, and design-critical timing and accuracy data - all confirmed against Analog Devices' official Rev. 0 datasheet.
Technical Context
The AD7862BRZ-10 integrates two independent 4 µs successive approximation ADCs, each paired with a track-and-hold amplifier, enabling true simultaneous sampling of VA1/VA2 or VB1/VB2 on falling CONVST edge. Aperture delay matching is 200 ps typ, ensuring sub-degree phase alignment across channels.
It uses an internal +2.5 V reference (±10 mV @ +25°C, 25 ppm/°C TC) and operates from a single +5 V supply (±5%). Conversion results are output via a 12-bit three-state TTL parallel bus (DB0–DB11), controlled by CS, RD, and A0 for channel multiplexing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees no missing codes and supports 4096 distinct digital levels per channel. |
| Conversion Time | 3.6 µs max - enables 250 kSPS throughput per channel with deterministic latency for closed-loop control. |
| Analog Input Range | ±10 V - matches industrial sensor outputs and motor phase voltages without external scaling. |
| Relative Accuracy | ±1 LSB max - ensures end-point linearity within ±0.024% FSR for precision measurement systems. |
| SNR + THD | 70 dB min @ 100 kHz - supports clean digitization of high-frequency AC waveforms in UPS and motor drives. |
| Aperture Delay Matching | 200 ps typ - maintains <0.01° phase error at 50 kHz, critical for vector-controlled motor feedback. |
| Power Dissipation | 60 mW typ - enables low-thermal-load integration in dense industrial I/O modules. |
Pinout & Package
AD7862BRZ-10 is housed in a 28-lead SOIC (Small Outline Integrated Circuit) package with standard 0.3-inch body width and gull-wing leads. Pin 1 is located at the top-left corner (notch-marked side), with pins numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 28 | NC | No connect - must remain unconnected; no internal function or routing. |
| 2–6, 9–15 | DB11–DB0 | 12-bit parallel data bus - outputs twos-complement codes; three-state TTL compatible for direct MPU/DSP interfacing. |
| 7 | DGND | Digital ground reference - separate from AGND to minimize digital noise coupling into analog path. |
| 8 | CONVST | Convert start trigger - falling edge initiates simultaneous track-to-hold and dual-channel conversion. |
| 16, 27 | AGND | Analog ground - dedicated return for mux, track/hold, reference, and ADC analog circuitry; must be star-connected. |
| 17, 18, 25, 26 | VB2, VA2, VA1, VB1 | Four analog inputs - VA1/VA2 form Channel A; VB1/VB2 form Channel B; all support ±10 V with ±17 V overvoltage tolerance. |
| 19 | VREF | Reference I/O - supplies or accepts +2.5 V reference; internal buffer provides 2 kΩ output impedance; requires 0.1 µF ceramic bypass to AGND. |
| 20 | A0 | Multiplexer select - selects read sequence: A0 low → VA1/VB1 first; A0 high → VA2/VB2 second. |
| 21 | CS | Chip select - active-low enable for parallel bus; must be asserted before RD to avoid bus contention. |
| 22 | RD | Read strobe - active-low signal that latches DB[11:0] data; timing-critical for meeting t5 (60 ns data access). |
| 23 | BUSY | Status flag - high during conversion; falls at completion to signal valid data ready for read. |
| 24 | VDD | +5 V ±5% supply - powers both analog and digital sections; decoupling required near pin with 0.1 µF + 10 µF. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling & conversion | Preserves phase relationship between VA1/VA2 and VB1/VB2 - essential for vector control and power factor calculation. |
| Internal +2.5 V reference | ±10 mV initial error and 25 ppm/°C drift - eliminates need for external reference in cost-sensitive industrial designs. |
| Overvoltage protection | ±17 V tolerance on all analog inputs - withstands transients in motor drive and grid-tied inverter applications. |
| Auto power-down mode | Reduces IDD to 25 µA standby - extends battery life in portable data acquisition and field test equipment. |
| Channel-to-channel isolation | –80 dB min @ 100 kHz - prevents crosstalk-induced measurement errors when monitoring differential signals. |
Applications
| AC Motor Phase Monitoring | Uninterruptible Power Supply (UPS) Feedback |
|---|---|
|
Use Scenario: Real-time capture of voltage and current waveforms across two motor phases (e.g., U-V and W-N) to compute torque, speed, and flux vectors. IC Role / Device Role / Timing Role: Dual-channel simultaneous ADC synchronizes sampling of complementary phase pairs to preserve zero-crossing alignment and harmonic content. Use Value: 200 ps aperture delay matching ensures <0.01° phase error at 50 Hz - enabling precise field-oriented control without software correction. |
Use Scenario: Continuous monitoring of input AC line voltage, output inverter voltage, battery DC voltage, and load current in online double-conversion UPS systems. IC Role / Device Role / Timing Role: Simultaneous sampling of line and output voltages captures instantaneous RMS, THD, and sag/swell events with temporal correlation. Use Value: 3.6 µs conversion time supports >200 kSPS aggregate rate - sufficient to resolve 50th harmonic (2.5 kHz) with Nyquist margin. |
| Data Acquisition System (DAS) Front-End | Industrial Communications Interface |
|
Use Scenario: Modular DAS module acquiring vibration, temperature, and pressure signals from multiple sensors in rotating machinery health monitoring. IC Role / Device Role / Timing Role: Two independent 12-bit ADC channels digitize differential sensor pairs (e.g., accelerometer X/Y axes) with matched gain and offset. Use Value: ±1 LSB relative accuracy and ±4 LSB bipolar zero error match ensure consistent calibration across channels - reducing per-channel compensation overhead. |
Use Scenario: Signal conditioning front-end in protocol gateways (e.g., Modbus RTU to EtherCAT) converting analog fieldbus inputs to digital domain for protocol translation. IC Role / Device Role / Timing Role: High-speed parallel interface (CS/RD/DB[11:0]) connects directly to microcontroller GPIO or FPGA I/O banks without glue logic. Use Value: 60 mW typical power dissipation allows integration into space-constrained DIN-rail mounted communication modules with passive cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7863ARZ-10 | 14-bit resolution, same pinout and timing; higher SNR (72 dB), slower conversion (4.5 µs), higher power (85 mW) | Better dynamic range for audio or high-fidelity sensor data; less suitable for ultra-fast control loops due to added latency | Select AD7863ARZ-10 when 14-bit resolution and improved SNR outweigh 0.9 µs conversion penalty and 25 mW extra power. |
| ADS8325IPWR | Single 16-bit SAR ADC, serial SPI interface, no simultaneous sampling; 250 kSPS, ±2.5 V range only, no internal reference | Requires external multiplexer and timing coordination for dual-channel capture; lacks phase coherence guarantee | Choose ADS8325IPWR only for non-phase-critical applications where higher resolution and smaller footprint justify added system complexity. |
Compared with AD7862BRZ-10, AD7863ARZ-10 offers higher resolution at the cost of latency and power, while ADS8325IPWR trades simultaneous sampling for resolution and interface simplicity - making AD7862BRZ-10 the optimal choice for phase-sensitive industrial control where timing determinism and ±10 V range are mandatory.
Availability
AD7862BRZ-10 is available at Aetrix Electronics and suitable for AC motor control, uninterruptible power supplies, and industrial data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7862BRZ-10 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7862BRZ-10 belongs to Analog Devices' precision data acquisition product line, engineered specifically for industrial automation applications demanding simultaneous multi-channel sampling, robust overvoltage tolerance, and deterministic timing.
FAQ
What is the maximum sampling rate supported by the AD7862BRZ-10?
The AD7862BRZ-10 achieves a maximum throughput rate of 250 kSPS per channel. This is enabled by its 3.6 µs conversion time and fast track/hold acquisition (0.3 µs), allowing full-cycle operation every 4 µs. The part's timing constraints require avoiding reads during conversion and within 300 ns prior to the next CONVST pulse to maintain datasheet performance - a constraint explicitly defined in the timing diagram (Figure 1) of the AD7862BRZ-10 datasheet.
Does the AD7862BRZ-10 require an external reference voltage?
No, the AD7862BRZ-10 includes an internal +2.5 V reference with ±10 mV accuracy at +25°C and 25 ppm/°C temperature coefficient. To use it, connect a 0.1 µF ceramic capacitor from the VREF pin to AGND. An external +2.5 V reference (e.g., AD780 or REF43) may be applied to VREF if tighter initial accuracy or lower drift is required - the internal reference is automatically overdriven in that case. This dual-mode reference architecture is fully documented for the AD7862BRZ-10 in the Reference Section of its datasheet.
How does the AD7862BRZ-10 handle simultaneous sampling of two channels?
The AD7862BRZ-10 uses a shared CONVST input to place both on-chip track-and-hold amplifiers into hold mode simultaneously on the falling edge, then initiates conversion on both channels in parallel. Aperture delay matching is specified at 200 ps typ, ensuring phase coherence between sampled signals - a key requirement for vector control and power quality analysis. This behavior is intrinsic to the AD7862BRZ-10's architecture and confirmed in its Functional Block Diagram and General Description.
What are the absolute maximum ratings for analog input voltage on the AD7862BRZ-10?
The AD7862BRZ-10 supports ±17 V absolute maximum analog input voltage on all four inputs (VA1, VA2, VB1, VB2) relative to AGND - exceeding its ±10 V operating range to accommodate transient surges in industrial environments. This rating is explicitly listed in the Absolute Maximum Ratings table of the AD7862BRZ-10 datasheet and applies across the full temperature range. Exceeding ±17 V risks permanent damage, per Analog Devices' ESD and overvoltage warnings.
Is the AD7862BRZ-10 pin-compatible with other variants in the AD7862 family?
Yes, all AD7862 variants - including AD7862BRZ-10, AD7862BRZ-3, and AD7862BRZ-2 - share identical 28-pin SOIC packaging and pinout. Differences are limited to internal scaling resistors and output coding (twos-complement for -10/-3, straight binary for -2), meaning PCB layout and interface logic remain unchanged across versions. This compatibility is confirmed in the Ordering Guide and Pin Function Description sections of the AD7862BRZ-10 datasheet.
AD7862BRZ-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7862BRZ-10 FAQ
1.How can I place an order for AD7862BRZ-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7862BRZ-10 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7862BRZ-10 reliable?
The price and inventory of AD7862BRZ-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7862BRZ-10 is usually 5 days.
3.What payment methods are accepted for AD7862BRZ-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7862BRZ-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7862BRZ-10?
AD7862BRZ-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7862BRZ-10 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7862BRZ-10?
For technical support, including AD7862BRZ-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7862BRZ-10 requirements.
6.How does Aetrix verify that AD7862BRZ-10 is sourced from the original manufacturer or authorized distributors?
All AD7862BRZ-10 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7862BRZ-10 meets industry standards.
7.What is the process for return or replacement of AD7862BRZ-10?
All AD7862BRZ-10 units undergo pre-shipment inspection (PSI). If there is an issue with AD7862BRZ-10, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7862BRZ-10 part is unused and in its original packaging.
Return procedure for AD7862BRZ-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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